我最终用自定义实现覆盖了 OpenSessionInViewFilter :
1:
web.xml:
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>com.mycompany.AutoFlushOpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
- Spring 工作需要 ContextLoaderListener。
- AutoFlush OpenSessionInViewFilter 用于拦截来自 /* url 模式的请求
2:
自动刷新 OpenSessionInViewFilter:
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.dao.DataAccessResourceFailureException;
import org.springframework.orm.hibernate4.support.OpenSessionInViewFilter;
public class AutoFlushOpenSessionInViewFilter extends OpenSessionInViewFilter {
protected Session openSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
try {
Session session = sessionFactory.openSession();
session.setFlushMode(FlushMode.AUTO); // This line changes the default behavior
return session;
} catch (HibernateException ex) {
throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex);
}
}
}
- OpenSessionInViewFilter 是拦截 hibernate 会话的默认方式(http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/orm/hibernate4/support/OpenSessionInViewFilter.html)
- openSession 方法打开一个休眠会话。 Hibernate 将使用此会话而不是创建新会话
- hibernate3.support.OpenSessionInViewFilter 允许您提供 FlushMode,hibernate4.support.OpenSessionInViewFilter 硬编码该值,因此我用自己的实现覆盖它
- 确保您的 sessionFactory bean 名称是 sessionFactory。否则,您需要将 sessionFactoryBeanName 设置为 web.xml 中的过滤器 init-param
3:
所有 Spring bean 都需要在 Web 应用程序上下文 (web.xml) 中注册:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:appContext.xml
...
</param-value>
</context-param>
4:
确保仅在需要使用 spring bean 时从应用程序上下文中获取它们。下面是一个如何示例:http://sujitpal.blogspot.co.uk/2007/03/accessing-spring-beans-from-legacy-code.html
确保只创建一份 Spring bean 副本!
如果您使用 org.springframework.context.support.ClassPathXmlApplicationContext 加载 Spring bean,这些 bean 将不会被过滤器选取。
5:
就我而言,还需要 contextId
<context-param>
<param-name>contextId</param-name>
<param-value>myApp</param-value>
<description>Required contextId when filter is supplied</description>
</context-param>
否则我会遇到以下问题:
2014-09-02 10:59:50 StandardContext[/myApp]Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
...
如果有人感兴趣,以下是我的 Ivy.xml 中的内容
<!--Spring 4.0.6.RELEASE -->
<dependency org="org.springframework" name="spring-aop" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-beans" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-core" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-expression" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-context" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-jdbc" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-orm" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-tx" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-web" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="aopalliance" name="aopalliance" rev="1.0" conf="compile->master,sources,javadoc"/>
<!--Hibernate 4.3.5-->
<dependency org="org.hibernate" name="hibernate-core" rev="4.3.5.Final" conf="compile->master,compile,sources"/>
<dependency org="net.sf.ehcache" name="ehcache-core" rev="2.4.8" conf="compile->master,sources,javadoc"/>
<dependency org="org.slf4j" name="slf4j-api" rev="1.7.5" conf="compile->master,sources,javadoc"/>
希望这对在升级 Spring 和 Hibernate 时遇到相同问题的人有所帮助。